Sectional grate bar



I J; s. wlLsoN SECTIONAL GRATE BARS Filed OCT.. ]922 2 Sheets-Shea L l Patented July 22, 1924.

JAMES S. WILSON, 0F SCRANTON, PENNSYLVANIA.

SECTIONAL (Ei-RATE BAR.

Application led October 17, 1922. Serial No. 595,102.

ployed under these conditions comprise a number of grate bars which are arranged within the tire boX of the furnace. It is desirable to employ, in lieu of such bars, a number of sections supported upon bearing Vbars and adapted to be independently removed when repairs become necessary. However, it has heretofore been found impracticable to employ grates of the sectional type where soft coal was burned, for the reason that in the combustion ofthe fuel D fusion takes place to a certain extent anc a fused mass is formed which kflows down-rv, wardly through the draft openings in the grate surface and, upon reaching the under side of the grate where the temperature is lower, becomes hardened and caked. To permit the passage of air through the grate it is necessary to remove these fused accumulations, but where it has been attempted to employ the ordinary construct-ions of sectional grates, under these conditions, it has been found that in ramming the poker between the fused accumulations andthe top surface of the grate to dislodge the accu mulations, the sections are extremely liable to become displaced with a consequent loss of time and fuel. Therefore, it is the primary object of the present invention to provide a sectional grate ofthe stationary type especially designed for use where soft coal isemployed as a fuel, means being provided for preventing displacement of the grate sections under the conditions mentioned above, without, however, in any way interfering with the ready and convenient removal of any one or more of the sections in the event repairs or replacements become necessary.

More specifically it is an important object of the present invention, to provide, in combination with a bearing bar of a specic struoturagrate sections supported thereon in assembled relation and embodying means Vadapted to coact with elements of the said bar to lock the sections to the bar and prevent their displacement when ramming away the fused accumulations, and in this connection the invention contemplates so constructing the locking means that while it will perform its function in the mostefli Acient manner, it will not in any way interfere with removal of any one or more of the sections and such removal may be accomplishepd `without the loosening or other manipulation of extraneous fastening means. In the accompanying drawings: f Y y Figure l is a side elevation of the grate structure embodying the present invention; I

Figure 2 is a top plan view thereof;

Figure Sis a detail vertical longitudinal sectional view on the line3'-8 of Figure 2;

Figure 4 is a vertical transverse sectional view on the line 4*'1 of Figure 3; 7

Figure 5 is a similar view on the line of Figure 3; A

Figure 6 is a perspective view of one end of one of the sections;

Figure 7 is a similar view of the other end of the said section.

The grate sections embodying the invention are indicated in general by the numeral l and these sections are assembled and supported upon bearing bars which are indicated by the numeral 2.` While these bears ing bars are capable of employment in supporting` grate sections of variousy constructions differing from the grate sections disclosed herein, they serve, inthe particular combination, a new purpose which will presently` bemade clear. Each of the bearing bars 2 is cast integral throughout and compises yspaced side members 3 which may be given the form illustrated more particularly in Figurel of the drawings.l or may be given any other form desired. These side memn bers 3 are connected at their ends by cross pieces 4 which are, as stated, integral with the said side members, and the side members are furtherk connected by integral cross pieces`6 extending in a series throughout their lengths and located close totheir upper edges.4 .The bearing bar is to be suplported in the usual manner within the frame of the grate structure and of course any desired number of the bars will be employed and they may be arranged rin a single group or in a number of groups, as may be desired. v

llO

The grate ysections l are of counterpart being so spaced as to provide :longitudinal air passages 12 of the required area opening .vertically through the supporting surface of. Vthe section, it being evidentby `reference Y Vto the drawings thatthefupper edges ott-lie 4sides 7, bars V84, end pieces 9 kl0, an d brideepieoo-ll, elloeoooy e @demostene and constitute theqsupporting surfaceof. the

section. Y

The-'looking means for preventing displacement of.' the Sedtions. preterablyvl coinprises a'dependingboss lcast integral between `the middle woof'tbe eerleeoffloars 8 and Ylocated neer the. end9..o.the section. This boss. is yformed- 4prejer'ablyV with a rounded or` arcuatelower edge indicated by the nunieralnl, and withaseatingrecess 15 which opens, by vway of a throat .16throngh the saidedge, the recess and throatlikewise openingthrough the opposte'side facesof the said boss. As illustratedmost clearly in Figure 8 of thedrawings theside wallsoi1 the throat 16,'which ,wallsareindicated by the numeral 17, are'slightly convergedf in an Vu Warddirection and as thel throat i's some wiat rnarrower thanothe recess l5, locking lugs 1 8 are provided at the opposite sides or' the said throat, the upper side of' each of thesevlugs providing a downwardly inclined shoulder 19. The throat 16is of a width just ,Sullicently greater than the greatest transverse dimension of the bridge pieces6, to permit the opposing ends of the lugs 18 to pase the bridge peceras the Seetion sde- Poeed upon o1n removed 'from the bearing bar. In other words, the'throat is of va width to provide sucient Clearance to enable the bridgepiece 6 to enter the, recess lrthrough the saidv throat,rand it will likewise be observed by reterenceto Figure 3 that the distance between the top wall ofthe recess 15 andthe shoulders 19 is slightly greater than the thickness of the bridge pieceQt so that the bridge Pooe Will loe-freely eooommodated within Vthe recess. By :reference ltofFigure 5 Vit vwill be evidentthat when thesections are disposed upon the bearing bars, they will rest upon the upper edges VVof the side meinbers of the bearing bar in properlycentered relation,y and with bridge pieces 6 received within the recesses 15V of the several sections. The recess 15 of each sectionv being of greaterY width,l than V the "throat 16, V,and

theretorewof greater than 'transverse4 dimension of the bridgefpiece `6 received therein, V'thesec'tion 'may "have bodily shitting movement upon the Y' bearing bar lonetodioellythoreef; Y Qi ooutesio noseting the Y section upon the.bea1 'ingban it will beso positionedy that thethroat A16 will be Vimmediately above thebridge piece 6 which is to beengaged, and the section may then be lowered into position resting upon the har.y Likewise removal of the section may be readily accomplished by shifting it in one direction or the ,other the requisite short distance to bring the throat 16 immediately beneath the said bridge v,piece 6, whereupon the section may. bey bodily lifted' -roinithe bar. However, thelugs 18 are sozpositioned that the' shoulders 19 thereof may engage beneath 4the bridge piece 6, and it theretore Vfollows.that in thegranirning. ofthe accumulations. from theftop elrfaoe oi the sections, the sections will be rdis'plafced, longitudtitlly will, of' courSe, be securely `locltedfto y'the s bearing.v bar. and prevented ,from 'being up wardly' displaced l In order. that the other end of eachv section may be lsimilarly locked under. the condif j tionsV noted, means isprovided which'will now be described. The numeral 20,.,indicat`es vlugs which preferably have beveled for, in-

volned.under faces l2l and which @reformed integral vupon they end piece 9 oteach section,'being located at, the Opposite sides 'tot the longitudinal middle ,of the Section.

Lockinglips 22 are ysimilarly Jformed upon the end piece 10 of each section and are so positioned that when two ofthe eeotone-:elo assembled end to end upon ,the bearing bar, the lips '22 of one section will engage beneath'the lugs 20 of the adjacent section.'

Vnasnu'rch that en d `ot thelastinentioned section which carries the lug 20, isloc'led to the ,bearing loer through engagement of one or another of its lugs l8"bfelleath the bridge piece 6, and this end ofthesaidcond-mentioned section is therebyplevelltod from lifting from the bar, theen egementof the lip's'22l beneath the lugs 20, wiof course, prevent-"the meeting end of `the. lirstinentiolled or Companion eeeton troni-'lifting Vtrom the loer.'y It ther-etere follows/that when ell of. the Seotofns. .have V been arranged inproperly assembled relation upon the bearing baithey will allA loe looked against upward 4displacenient especially undor the 'Conditions' referred to above, .a1- .though anyr one of the sections ,mevberea'dl/ removed by @entering tethroat 1.6 with relation] tothe .eheesod 'bridge piece 6; Y lifting its end 9 to clear the lugs 18ffrom-the bridge, nieoe, and then, slipping the "1 S22 out froifnY engagement beneath' "the Llugs 2.0 upon thel companion section, and byfafreversal of these' operations', the same vsection or repleoeteent, 'section 'may be In order to provide for a proper proportioning of the air space between the adjacent ends of companion sections, the end piece 9 of each section l is preferably formed with bosses 23 located outwardly beyond the lugs 20, and the opposite end l() of each section is formed midway between the lips 22 with a boss 24;.

In order to properly relatively space the sections upon adjacent bearing bars, the sides 7 of each section are formed upon their outer faces with spacing lugs or bosses 25, and the bosses upon the two side members of each section are arranged in the stag- Cglered relation shown in Figure 2 of the rawings.

Having thus described the invention, what is claimed as new is:

1. In a stationary grate, in combination, a bearing bar having an anchoring element, a grate section disposed upon the bar and normally stationary but having limited movement longitudinally of the bar, the said section having spaced locking elements near one end engageable beneath the anchoring element, and means at the ends of the grate section normally preventing upward displacement of the grate section from the bearing bar.

2. In a stationary grate, in combination, a bearing bar having transverse bridge pieces, and a grate section disposed upon the bearing bar and resting upon said bridge pieces, the grate section having a depending boss near one end formed with a recess and with locking elements at the open side of the recess, said boss being engaged around one bridge piece and the dimensions of the recess being somewhat greater than the dimensions of the bridge piece and the distance between the locking elements beingV only slightly greater than, the width of the bridge piece whereby the grate section may have limited movement longitudinally of the bearing bar and will normally be prevented from moving upwardly.

3. In a stationary grate, in combination, a bearing bar having spaced side members and transverse bridge pieces between'the side members, a plurality of grate sections disposed upon the bar, a depending boss upon each section near one end thereof having a recess receiving one of the bridge pieces and provided upon the opposite walls thereof with locking elements yengageable beneath the bridge piece whereby the sections may have limited longitudinal movement but will normally be prevented from upward displacement, means at the ends of the sections for maintaining them in spaced relation, and means at the ends of the sections tol hold themagainst upward displacement.

4. In a stationary grate, in combination, a bearing bar having anchoring elements, grate sections disposed upon the bar and having limited movement longitudinally thereof, the sections at their meeting ends having mutually engaging means preventing upward displacement of one section relative to the other section, and means ade. jacent one end of each section for coaction with an anchoring element of the bearing bar to restrain the said end of the section from upward displacement.

5. In a stationary grate, in combination,l

a bearing bar having an anchoring element, grate sections disposed upon the bar, the said sections at their meeting ends being provided one with a lug and the other with a locking lip engageable beneath the lug, means upon the section having the locking lip adjacent the other end thereof for locking engagement with the anchoring element ofthe bearing bar, and means for maintaining the ends of the sections in spaced relation and permitting limited endwise movement of the sections.

6. In a stationary grate, in combination, a bearing bar having anchoring elements, grate sections disposed upon the bar and each provided adjacent one end with means engageable with an anchoring element to restrain the said-end of the section from upward displacement and on its opposite endv with laterally spaced lips engaging under correspondingly spaced lugs on the meeting end of an alined section, the ends of the sections being otherwise out of Contact, and spaced abutments on the ends of the sections permittingrlimited endwise movement thereof.

7 In a stationary grate, in combination, a bearing bar, a plurality of grate sections disposed thereon, coacting locking means upon the bearing bar and one end portion of each section for preventing upward displacement of the said end of the section, means on the sections to prevent upward displacement of the ends thereof remote from said coacting locking means, and means on the yends of the sections to maintain them in spaced relation and permit limited endwise movementthereof whereby each section may be removed independently of all the other sections. In testimony whereof I aiiiX my signature.

JAMES s. wiLsoN. [1.. sj 

